Transmission mechanism.



A. B. & W. BROOKMAN.

TRANSMISSION MECHANISM.

APPLICATION FILED JUNE 14, 1912.

Patented Mar. 3, 1914.

2 SHBETB-SHBET 1.

A. B. & W. BROGKMAN.

TRANSMISSION MECHANISM.

APPLICATION FILED JUNE'14, 1912.

Patented Mar. 3, 1914.

2 SHEETS-SHEET 2.

WITNESSES ATTORNEYS tea ATE

"I l l I TRAITSIVIISSION MECHANISM.

Application filed June 14. 1912.

To all whom it may concern:

Be it known that we, Anorsins B. BROOK- )mx and WILLIAM BROCKMAN, ofLawrence, county of Xuckolls, and State of Nebraska, have inventedcertain new and useful Improvements in Transmission Mechanism, of whichthe following is a specification.

Uur invention is an improvement in transmission mechanisms, and has forits object the provision of an Operating mechanism of the characterspecified, of the fewest possible parts and of the simplest type,wherein a selective lever is provided for controlling both the clutchand the gear transmission mechanism, and wherein when the selectivelever is in neutral position, the gear transmission mechanism is out ofmesh, and when moved out of neutral position the selected gear is firstfully engaged before the clutch is permitted to close, and wherein thegears are always positively locked with respect to the operating lever,and which will be reliable, durable, and easily operated.

In the drawings: Figure '1 is a horizontal section of the transmissionmechanism; Fig.

2 is a section on the line 22 of Fig. 1; Fig. 3 is a side view of Fig.2, showing the parts in one position; Fig. 4 is a similar View, showingthe parts in another position; Fig. 5 is an enlarged view of the cam;Fig. 6 is a side view of the clutch operating mechanism; and, Fig. 7 isa partial plan view of Fig. 6. i In the present embodiment of theinvention, the crank shaft 1 is arranged in the crank case 2, and thesaid shaft is held in a bushing 3, journaled in a ball bearing a. Thefly wheel 5 is secured to the shaft in an enlargement 6 in a casing 7which incloses the transmission mechanism, to be described. ()ne section8 of a clutch is secured to the fly wheel, by means of a flange 9 on thesection which laps on the rim of the Wheel, and is secured thereto byscrews 10. The other sections 8 and 8 of the clutch are arranged onopposite sides of the section 8, and each is secured. to a sleeve,encircling a shaft 11 arranged in ali'nement with the shaft 1. Thesleeve 12 of section 8 is adjacent to the shaft 11, and the sleeve 13 ofthe section S -is spaced apart from sleeve 12, and a coil spring 14 isarranged between the sleeves. The spring bears at one end against thesection 8", and at the other against the end of Specification of LettersPatent.

Patented Mar. 3, 12 14.

Serial No. 703,692.

sleeve 12, and tends to force the sections 3 and 8" toward the section8.

Each sleeve is provided with an annular groove at the end remote fromthe clutch, each groove being formed by a pair of annular spaced ribs,at the end of the shaft. A ring 16 is arranged in the groove 15 ofsleeve 12, and a similar ring 17 is arranged in the groove 18 of sleeve13. Each ring is provided with oppositely arranged trunnion or journalpins 19.

The shaft 11 is provided with a bushing 20, at the opposite end'of thesleeves 12 and 13, from bushing 3, and the said bushing 20 is journaledin a ball bearing 21, in a cross web or diaphragm in the casing 7. Thesleeves 12 and 13 are operated by a shaft 23, journaled transversely ofthe casing 7, and provided adjacent to the shaft 11 with a hub 24:,having oppositely ezttending arms 25 and 26, (Figs. 6 and 7).

A pair of yoke-shaped levers 27 and 27 are provided for moving thesleeves l2 and 13, the body of each lever being connected by means of alink 28, with the adjacent arm of the hub. The lever 27 is connected toarm 25, and the lever 27 to arm 26. The arms of the levers 27 and 27 arepivoted to a common shaft 29, and each of the said arms 2727 is providedwith a pair of laterally extending spaced lugs 30 engaging oppositesides of the'adjacent trunnion 19.

The levers 27 and 27 are arranged on opposite sides of the grooves 15 atthe ends of the sleeves, and it will be evident that when the shaft 23is oscillated, the sleeves 12 and 13 will be operated to move the clutchsections 8 and 8 together, or away from each other, depending upon thedirection in which the shaft is oscillated.

The shaft 23 is operated by a cam 31, secured on the extended-end of ashaft 32, journaled in bearings 32 in the casing 7, at the end remotefrom the flywheel. A. sleeve 33 is secured on the shaft at approximatelyits center, and a selective lever 34 is pivoted to the sleeve, as shownat 35, for swinging movement longitudinally of the shaft.

The lever 3a in its neutral position, is in the connecting portion orpassage 36, between two parallel laterally spaced guideways 37 and 38 inthe wall of an upward extension 39 of the casing 7. When the lever is inthe passage 36 it can swing longitudinally of the shaft, but can notswing angularly thereof, and when in either guideway the lever can swingangularly, but cannot swing longitudinally of the shaft.

Sleeves 40 and 40 are journaled on the shaft 32, one on each side oflever 34, and each sleeve is provided with an engaging jaw, comprisingan arm 41, 41, arranged radially of the sleeve and provided with alateral lug 42, 42 at its upper end. The lugs 42 and 42 are in positionfor engagement by the lever when the lever is in the adjacent guideway.

Springs 44 and 44 are secured to the respective arms 41 and '41, andeach spring bears at its free end against the adjacentside of the lever,and acts normally to hold the lever in the pasage 36, that is, inneutral position. Arms 45 and 45 are secured to the respective sleeves40 and 40 at their outer ends, and each armis provided with a laterallyextending pin 46 in its outer face. (Fig. 5). v 1

A counter-shaft 4'? is placed parallel with shaft 32, in bearings 48 inthe casing 'Y, and blades or cams 49 and 49 are arranged at the oppositeends of the shaft, each blade or cam having a hub 50, journaled on theshaft 47. Each blade or cam is provided with a pair of arc-shapedgrooves 51 and 52 in its outer face, for engagement by the adjacent pinor roller 46, the said grooves intersecting at the end adjacent to shaft47.

Each of the hubs is provided with a. radial arm 53 extending at rightangles to the cam, and a 'rod is connected to each arm. The rods 54 and54, are slidable in the before mentioned cross webs or diaphragms 22,which extend across casing 7, and each rod is provided with a fork 56 atits front end. The arms of the forks are arranged on opposite sides ofthe arms 53, and are pivoted thereto, so that when either hub 50 isoscillated the rods are moved longitudinally.

Each of the rods 54 and 54 is provided with an inwardly emending arm 5'?for red 54 and 57 for rod 54, and each arm is forked at its inner end,for engaging an annular groove in the hub of a gear wheel. The arm 57engages the hub of a gear wheel 58, and the arm 57 that ofa gear wheel59.

- The gears 58 and 59 are the shifting gears for the diiferent speeds ofthe transmission mechanism and the said transmission mechanism may be ofany desired or usual construction.

It will be evident from' the description, that when the selective lever34 is swung laterally out of the passage 36 it will engage one of thelugs 42 or 42 and when the lever is then moved angularly of the shaft32it will follow the guideway 37 or 38, with which it is in register, andwill oscillate the sleeve 40 or 40", connected to thejaw. If forinstance the lever is in guideway 37, sleeve 40 will be oscillated, andarm 45 will be swung. The pins 46, in the neutral position of the lever34, occupy a position at the junction of the grooves 51-'52, (Fig. 5).Should for instance the lever 34 be moved forwardly in passage 37, asshown in Fig. 3, the pin 46 will move into groove 52 swinging the blade49 downwardly, and arm 53 upwardly. Rod 54 will be moved longitudinallytoward the flywheel, moving gear 53 toward the flywheel. A rearwardmovement of lever 34', as shown'in Fig.4, will swing blade 49 and arm 53in the opposite direction, moving rod 54 and gear 58 in the oppositedirection. Should lever 34 be engaged with jaw il -42, gear wheel 59will be moved in the same manner as described for ear 58. Shaft 32 alsooperates the clutch 88-8 through cam 31. The highest portion of the saidcam is in engagement normally, that is, when lever 34 is in neutralposition, with a roller 60, j ournaled on a pin 61, in the arms of afork 62, connected to a socket 63, into which one end of a link 64 isthreaded. The other end of the link is provided with a fork 65, whosearms engage opposite sides of radial arm 66 on the shaft 23.

' The shaft 23, operates the clutch 8-8 3 as before mentioned, and whenthe cam 31 is in the normal position of Fig. 1, the clutch sections aredisengaged. hen the selective lever has been moved in either direction,in either guideway, as soon as the lever reaches the end of theguideway, as shown in Figs. 3 and 4, the cam 31 releases roller 60, andpermits shaft 23 to swing free, and permits spring 14 to force theclutclrsections 8 and 8 toward section 8. The first movement of lever 34from neutral position operates the gear wheel of the transmissionmechanism to connect the proper-gears, and when the gears of thetransmission mechanism are fully engaged, the clutch sections 8 and 8are released to permit the spring 14 to force them together. On theother hand the first movement of the selective lever to release orchange gears loosens the clutch, and the clutch is not permitted toclose, until the change is complete.

In the ordinary gear transmission mechanism, it is necessary to releasethe friction clutch, usually with a foot pedal, then select the gearwith the hand lever, and after the gear has been selected and connected,the clutch is then again closed by releasing the foot from the pedal. Inthe present inve tion, the clutch and the gears are controlled by asingle hand lever, and the transmission may have three forward speedsand one reverse. VVhen the selective lever is at neutral position, allthe gears are disconnected, and the friction clutch is released. Whenthe selective lever is moved into either guideway, theselected gear,whatever the speed, either forward or reverse, is first fully broughtinto mesh, at the very beginning of the movement of the lever fromneutral position, and the further movement of the lever will release theclutch, and'permit the spring to close the same. In addition, none ofthe transmission gears will be moved while the clutch is closed.

The gears 58 and 59 are slidable on a squared portion of thetransmission shaft, so that while they are freely movable longitudinallythereof they must rotate with re spect thereto. Each of the said gears58 and 59 is adapted to mesh with two gears of the transmission, notshown, so that when either gear is moved in either direction, a speedwill be obtained, Four changes are thus permitted, that is three speedsforward, and one reverse. Since the transmission mechanism forms no partof the invention, it is not thought necesary to further show or describethe same.

Vi e claim:

1. A device of the character specified, comprising a crank shaft, atransmission shaft, a clutch for connecting the crank shaft and thetransmission shaft, a spring normally pressing the clutch sectionstogether, means for holding the sections apart, an operating shaft, acasing in which the shaft is journaled, a collar secured to the shaft, aselective lever connected to the collar for swinging movementlongitudinal to the shaft, a sleeve on the shaft on each side of thecollar, an arm on the inner end of each sleeve, each arm having a lugextending toward the lever,-said casing having a pair of parallelguideways extending transverse to the shaft for holding the lever inengagement with the lug of the adjacent arm, said casing having apassage connecting the guideways at the neutral position of the lever,agear transmission mechanism for connecting the transmission shaft tothe axle at did'erent speeds. means operated by theangular movement ofthe lever in either direction and inv either guideway for operating saidtransmission mechanism, and a connection between the lever and theholding means forreleasing the same at the end of the movement of thelever.

2. In a transmission mechanism for motor vehicles, a drive shaft, atransmission shaft, a plurality of means for connecting the said shaftsto cause them to rotate at different speeds with respect to each other,an operating shaft, an operating sleeve journaled on the shaft, oneaclrside of the lever, 21. connection between the sleeves and the saidconnecting means to operate one of the said means when either sleeve ismoved in either direction, a selective lever mounted to swinglongitudinally of the operating shaft and. to rotate the said shaft, anarm arranged. on

guiding the lever in its angular movement.

when in engagement with either arm. said guideways having acommunication for receiving the lever when in neutral position, andyielding means for normally retaining the lever in such position.

8. in a transmission mechanism for motor vehicles, a drive shaft, atransmission shaft, a plurality of means for connecting the said shaftsto cause thenrto rotate at different speeds with respect to each other,an operating shaft, an operating sleeve on the shaft on each side of thelever, a connection between the sleeves and the said connecting meansfor operating one of the said means when either sleeve is moved ineither direction, a selective lever mounted to swing longitudinally ofthe operating shaft and to rotate the said shaft, a pair of guidewaysarranged alongside cach other transversely of the operating shaft, saidguideways having a communication for receiving the lever when the saidlever is in neutral position, means connected with each sleeve adjacentto one of the guideways for engagement by the lever when in the guidewayto move the sleeve, and yielding means for normally retaining the leverin the communication be tween the guideways.

a. In a transmission mechanism for motor vehicles,-a drive shaft, :1transmission shaft, a plurality of means for connecting the said shaftsto cause them to rotate at different speeds with respect to each other,an operating shaft, an operating sleeve on the shaft. a connectionbetween the sleeves and the said connecting means for operating one ofthe said means when either sleeve is moved in either direction, aselective lever mounted to swing longitudinally of the operating shaftand rotate the said shaft, a pair of guideways arranged alongside eachother transversely of the operating shaft, said guideways having acommunication for receiving the lever when the said lever is in neutralposition, and means connected with each sleeve adjacent to one of theguideways for engagement by the lever when in the guideway to move thesleeve.

In a transmission mechanism for motor vehicles, the combination with thespeed changing gears, of an operating shaft, sleeves on the ends of theshaft for operating the said gears, aselective lever mounted to swinglongitudinally of the operating shaft and to rotate the said shaft, apair of guide- Ways arranged alongside each other transversely of theoperating shaft, said guideways having a communication for receiving thelever when it is in neutral position, and means adjacent to eachguideway and connected with the adjacent sleeve for engagement by thelever when in the guideway, each sleeve being connected with a speed achanging gear for operating the same.

i 6. In a transmission mechanism for motor vehicles, the combinationwith the crank shaft and the transmission shaft, and a normallyoperative clutch for connecting the said shafts, of means forrestraining the operation of the clutch, speed changing gears, anoperating shaft, sleeves on the said shaft at the ends thereof andconnected with the speed changing gears for shifting the said gears, aselective lever connected to the operating shaft to rotate the same andto swing longitudinally thereof, a pair of 'guideways extendingtransversely of the operating shaft, means in connection with eachsleeve for engagement by the selective lever when in the adjacentguideway to move the sleeve, and a connection between the operatingshaft and the clutch restraining mechanism for releasing the saidmechanism when the speed changing gears have been shifted.

7. A device of the character specified, comprising a driving shaft, atransmission shaft, and a driven shaft, a clutch for conv nesting thedriving shaft and the transmission shaft, a plurality of means forconnecting the transmission shaft and the driven shaft to cause them torotate at different relative speeds, a spring normally holding theclutch in operative position, an

operating shaft arranged transversely of the transmission shaft, aselectivelever mounted to swing longitudinally of the operating shaftand connected to theshaft to rotate the said shaft when the selectivelever is moved angularly with respect to the shaft, a sleeve on theoperating shaft on each side of the lever, an arm on each sleeve, saidarm being arranged on opposite sides of the lever, each arm having alateral inwardly extending lug for engagement by the lever, a pair ofparallel guideways for holding the lever in engagement with the lug ofeither arm, said guideways having a communication at the neutralposition of the lever, a-

connection between each sleeve and a plurality of connecting means foroperating one of the said means when the sleeve is oscillated in eitherdirection, and a connection between the operating shaft and the clutchfor holding the clutch in inoperative position until near the end of itsangular movement in either direction.

8. -A device of the character specified, comprising a driving shaft, atransmission shaft, and a driven shaft, a clutch for connecting thedriving shaft. and the transmis sion shaft, a plurality of means forconnecting the transmission shaft and the driven shaft to cause them torotate at different relative speeds, a spring normally holding theclutch in operative position, an operating shaft arranged transverselyof the transmission shaft, a selective lever mounted to swinglongitudinally of the operating shaft and connected to the shaft torotate the said shaft when the selective lever is moved angularly withrespect to the shaft, a sleeve on the operating shaft on each side ofthe lever, an arm on each sleeve, said arms being arranged on oppositesides of the lever, a pair of parallel guideways for holding the leverin engagement with either arm, said guideways having a connection forreceiving the-lever and, holding it in neutral position, a connectionbetween each sleeve and a plurality of the connecting means foroperating the said means when the sleeve is oscillated in eitherdirection, and a connection between the operating shaft and the clutchfor holding said clutch in inoperative position while the lever is inneunecting the driving shaft and the transmission shaft, a plurality ofmeans for connecting the transmission shaft and the driven shaft tocause them to rotate at different relative speeds, a spring normallyholding the clutch in operative position, an operating shaft arrangedtransversely of the transmission shaft, a selective lever mounted toswing longitudinally of the operating shaft and connected to the shaftto rotate the said shaft when the selective lever is moved angularlywith respect to the shaft, an arm on each side of the lever for engagingthe lever when moved angularly of the shaft, means for holding the leverin engagement with each arm, meansbetweenthe said means for holding thelever in neutral position and for permitting it to pass into eitherguideway, a connection between each arm and a plurality of connectingmeans for operating the said means when the arm is moved in eitherdirection, and a connection between the operating shaft and the clutchfor holding the clutch in inoperative position when the lever is inneutral position.

ALOYSIUS B. BROGKMAN. WILLIAM BROCKMAN.

, l Vitnesses: F. L. LEWIS, R. B. MoIN'rInE.

